| Equus Limited | London | 2022 |
| Equus Stables Ltd | Berkhamsted | 2024 |
| ER & JA Butler (Farming) Limited | Peterborough | 2011 |
| ER Cornforth Ltd | Whitby | 2020 |
| ER Hillcrest Limited | Newry | 2014 |
| ERA International Ltd | Epping | 2026 |
| ERA Support Services Limited | Manchester | 2020 |
| Erfmann Manor Farm Ltd | Chorley | 2026 |
| Erganagh Farm Group Ltd | Castlederg | 2021 |
| Eriboll Highland Ponies Ltd | Lairg | 2025 |
| Eric Boyd Forestry Limited | Glasgow | 2003 |
| Eric Distin Agriculture Ltd | Callington | 2023 |
| Eric Trimble Limited | Newry | 2012 |
| Ericht West Grange Limited | Haslemere | 2018 |
| Eridge Park Venison Limited | Tunbridge Wells | 2010 |
| Eridializa Ltd | Basildon | 2025 |
| Eriska Arabians Limited | Bradford | 2013 |
| Erisort Trading (Aline) Limited | South Lochs | 2006 |
| Erlend Flett Plant Hire | Orkney | 1983 |
| Ermyn Lodge Stud Limited | Epsom | 2004 |
| Erne Rivers Trust | Enniskillen | 2014 |
| Ernest Bowles & Sons Limited | Cranbrook | 1950 |
| Ernie Smart Ltd | Fraserburgh | 2019 |
| Erray Farm Limited | Isle Of Mull | 1983 |
| Errigal Grow and Marketing Limited | Aughnacloy | 2021 |
| Eryri Apiaries Ltd | Bangor | 2026 |
| Eryri Arboriculture & Consultancy Limited | Bangor | 2024 |
| ES Eco Group Ltd | London | 2022 |
| ESA Treecare Limited | Cowbridge | 2003 |
| Escalwen Limited | Carmarthen | 2012 |
| Escargourmet Limited | London | 2024 |
| ESE Contracts Ltd | Stafford | 2012 |
| ESG Ivyfarm Ltd | Crumlin | 2021 |
| Esgairhir Uchaf Farm Ltd. | Carmarthen | 2020 |
| Esh.Ep. Management Ltd | Newtown | 2020 |
| Eshcol Enterprises | Fraserburgh | 2014 |
| Esher Logs & Tree Surgeons Ltd. | Morden | 2018 |
| Eshott South Farm Limited | Morpeth | 1995 |
| Eshton Farms Ltd | Ballymena | 2024 |
| Eshton Park Limited | Skipton | 2023 |
| ESK Farm Limited | Midlothian | 1996 |
| Eskay Global Ltd | London | 2025 |
| Eskdale & Liddesdale Farming Limited | Langholm | 2017 |
| Eskdale Forestry Limited | Whitby | 2019 |
| Eskdale Valley Limited | Whalley | 2020 |
| Eskdalemuir Forestry Limited | Chirk | 1994 |
| Esker Mushrooms Ltd | Dromore | 2017 |
| ESM Farms Ltd | Armagh | 2023 |
| Esme 24 Ltd | Fraserburgh | 2016 |
| ESP Equine Limited | Somerton | 2021 |
| ESP Plant Limited | Luton | 2019 |
| Espemar Fisheries Limited | Penryn | 2011 |
| Espresstech Ltd | Dundee | 2015 |
| Esprit Tree Services Ltd | Isleworth | 2025 |
| ESS K9 Security & Support Services Ltd | Bristol | 2017 |
| Essafinaat UK Limited | Ely | 2016 |
| Esse Limited | Bath | 2001 |
| Essex & Suffolk Pest Solutions Limited | Ipswich | 2010 |
| Essex and Herts Pest Control Limited | Dunmow | 2014 |
| Essex Aquatics Limited | Sudbury | 2014 |
| Essex Arboriculture Ltd | Barnstaple | 2012 |
| Essex Elite Dog Training Limited | Sawbridgeworth | 2024 |
| Essex Estuaries Farm Cluster CIC | Maldon | 2026 |
| Essex Farm Services Limited | Billericay | 2008 |
| Essex Field Fencing Ltd | Hatfield Peverel | 2012 |
| Essex Growers Limited | Milton Keynes | 2014 |
| Essex Pawz Limited | Basildon | 2017 |
| Essex Shellfish Ltd | King'S Lynn | 2002 |
| Essex Tasty Food Ltd | Billericay | 2025 |
| Essink Excavations Ltd | Woldingham | 2021 |
| Essworthy Estates Limited | Okehampton | 2000 |
| Estates Limited | Peterborough | 1994 |
| Estates Management Cymru Limited | Swansea | 2006 |
| Esthwaite Ltd | Grange-Over-Sands | 2025 |
| Estuary Farm Limited | Peldon | 2021 |
| Esus Forestry and Woodlands Limited | Pewsey | 1995 |
| Esusenergy Limited | London | 2010 |
| ET Facilities Management Ltd | Billericay | 2025 |
| Etang Baits Limited | Ashford | 2018 |
| Etang DES Greens Fishery Ltd | Salisbury | 2025 |
| Etchden Court Farm Ltd | Ashford | 2020 |
| Etherealequus Ltd | London | 2023 |
| Ethica Environ Ltd | Bridgwater | 2024 |
| Ethical British Timber Ltd | Bristol | 2022 |
| Ethical Eggs Limited | Dunstable | 2021 |
| Ethical Forestry Ltd | Southampton | 2007 |
| Ethical Land C.I.C. | London | 2021 |
| Ethical Seafood Research Centre Ltd | Dalkeith | 2025 |
| Ethical Seafood Research Ltd | Dalkeith | 2021 |
| Ethical Sourcing & Sustainable Agri Contractors(Essac) Ltd | Hove | 2025 |
| Ethicrops Limited | Edinburgh | 2010 |
| Ethiebarns Farming Company | Arbroath | 1973 |
| Etimos Ltd | Leek | 2020 |
| Etlt Limited | Corby | 2019 |
| Etoile Lake Limited | Ware | 2001 |
| Eton ST Groomers Ltd | Richmond | 2023 |
| Eton Wick Quality Milk Producers Limited | Windsor | 1964 |
| Ettrick Trout Co. Limited | Stirling | 1978 |
| Ettridge Farm Limited | Chelmsford | 1956 |
| Etty Farms Limited | York | 2023 |